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The first extrasolar planet found to have a density compatible with being a rocky planet is CoRoT-7b in 2009. 55 Cancri e was found to be a terrestrial planet in 2011. First super-Earth orbiting a main sequence star [NB 2] Gliese 876 d: Gliese 876: 2005 Orbits a red dwarf star. First icy extrasolar planet orbiting a main sequence star OGLE-2005 ...
The exoplanets were found using a statistical technique called "verification by multiplicity". 95% of the discovered exoplanets were smaller than Neptune and four, including Kepler-296f, were less than 2 1/2 the size of Earth and were in habitable zones where surface temperatures are suitable for liquid water. [17] [18] [19]
51 Pegasi b: In 1995 this became the first exoplanet orbiting a main-sequence star to have its existence confirmed.It is a hot Jupiter with a 4.2-day orbit. [12]47 Ursae Majoris b: In 1996 this Jupiter-like planet was the first long-period planet discovered, orbiting at 2.11 AU from the star with the eccentricity of 0.049.
Water vapor and ice have been found to be common elements of extraterrestrial atmospheres, however water in liquid form has not been confirmed beyond the Earth. Extraterrestrial liquid water in the Solar System is likely uncommon, although it has been hypothesized to exist in some of its moons , and to have formerly existed on Mars and Venus.
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not then recognized as such. The first confirmation of the detection occurred in 1992. A different planet, first detected in 1988, was confirmed in 2003.
First exoplanet discovered orbiting a main-sequence star 2015 NameExoWorlds Galileo: Italian astronomer: 55 Cancri A (Copernicus) 0.8306 14.65152 0.115227 radial vel. 1996 40.9 0.91 5196 2015 NameExoWorlds Brahe: Danish astronomer: 0.1714 44.4175 0.241376 radial vel. 2004 2015 NameExoWorlds Lipperhey: Dutch lensmaker: 3.878 4825 5.503 radial ...
Lists of exoplanets. List of directly imaged exoplanets; List of exoplanet extremes; List of exoplanet firsts; List of exoplanets discovered by the Kepler space telescope; List of exoplanets observed during Kepler's K2 mission; List of extrasolar candidates for liquid water; List of hottest exoplanets; List of coolest exoplanets; List of ...
2.6 billion years (11.2 Gya): HD 130322 planetary system, known as the first observed exoplanet system, forms; 3.0 billion years (10.8 billion Gya): Formation of the Gliese 581 planetary system: Gliese 581c, the first observed ocean planet and Gliese 581d, a super-Earth planet, possibly the first observed habitable planets, form. Gliese 581d ...